com.fasterxml.jackson.databind.exc.InvalidDefinitionException:

stay Springboot This error occurred to me when I called the interface remotely in the project ,

At that time, I was confused ;
Then the explanation behind the mistake says :
" Can't construct **** Example **** '( Like the default construction , No creator ): Cannot deserialize from object value ( There is no delegate based or attribute based creator ) "

At first, I didn't quite understand what it meant ; Later, it was found that my entity class did not add a parameterless constructor ;（ Manually added a parametric structure ）, The result is that it cannot be deserialized ;

a key ：
Add the nonparametric structure